CVE-2024-26685

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the end buffer async write() function, which handles the completion of block device writes. According to a syzbot report, this function may detect an abnormal condition of the buffer async write flag and cause a BUG ON failure when using nilfs2. The async write flag is used as a marker to resolve double list insertion of dirty blocks in nilfs lookup dirty data buffers() and nilfs lookup node buffers(). However, introducing async write for segment summary and super root blocks that share buffers with the backing device was irrelevant and redundant, leading to the possibility of a BUG ON check failure in end buffer async write() if independent writebacks of the backing device occurred in parallel.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.